/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMesh3.h
Collapse the edge between the two vertices, if topologically possible.
Ok on success, or enum value indicates why operation cannot be applied. Mesh remains unmodified on error.
virtual [EMeshResult](API\Runtime\GeometryCore\UE__Geometry__EMeshResult) CollapseEdge ( int KeepVertID, int RemoveVertID, double EdgeParameterT, [FEdgeCollapseInfo](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3\FEdgeCollapseInfo) & CollapseInfo )